The psychological fact of suggestion is that if statements are made again and again in a confident manner, without argument or proof, then their hearers will tend to believe them quite independently of their soundness and of the presence or absence of evidence for their truth.

FLATOW: So you would - how would you treat a patient like Sybil if she showed up in your officeBRAND: Well, first I would start with a very thorough assessment, using the current standardized measures that we have available to us that assess for the range of dissociative disorders but the whole range of other psychological disorders, too. I would need to know what I'm working with, and I'd be very careful and make my decisions slowly, based on data about what she has. And furthermore, with therapists who are well-trained in dissociative disorders, we do keep an eye open for suggestibility. But that research, too, is not anywhere near as strong as what the other two people in the interview are suggesting.It shows - for example, there's eight studies that have a total of 11 samples. In the three clinical samples that have looked at the correlation between dissociation and suggestibility, all three clinical samples found non-significant correlations. So it's just not as strong as what people think. That's a myth that's not backed up by science." Exploring Multiple Personalities In 'Sybil Exposed' October 21, 2011 by Ira Flatow